SpringMVC 中文乱码解决方案

首先了解源码

/**
 * Implementation of {@link HttpMessageConverter} that can read and write strings.
 *
 * <p>By default, this converter supports all media types ({@code &#42;&#47;&#42;}),
 * and writes with a {@code Content-Type} of {@code text/plain}. This can be overridden
 * by setting the {@link #setSupportedMediaTypes supportedMediaTypes} property.
 *
 * @author Arjen Poutsma
 * @since 3.0
 */
public class StringHttpMessageConverter extends AbstractHttpMessageConverter<String> {

public static final Charset DEFAULT_CHARSET = Charset.forName("ISO-8859-1");

private final Charset defaultCharset;

private final List<Charset> availableCharsets;

private boolean writeAcceptCharset = true;

关键点：

1. 源码默认的编码是ISO-8859-1：public static final Charset DEFAULT_CHARSET = Charset.forName(“ISO-8859-1”);

2. 修改方式：by setting the {@link #setSupportedMediaTypes supportedMediaTypes} property

解决方案

1、在spring-servlet.xml中添加

<mvc:annotation-driven>
        <mvc:message-converters>
            <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                <property name="supportedMediaTypes">
                    <list>
                        <value>application/json;charset=UTF-8</value>
                    </list>
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

2、在代码里写

@RequestMapping(value="/test",produces = "application/json; charset=utf-8")
@ResponseBody
public String testUTF8(HttpServletRequest request,HttpServletResponse response){
..........
}